Guide setting mechanism



I Inventor W @fem/arf iorneys -In mq Q HJM 4 Sheets-sheet l R. W. STEWART GUIDE SETTING MECHANISM Flled July 14, 1937 a/v/v'fw/p ay T24, 1938. R. w. STEWART M9743 GUIDE SETTING MECHANISM Filed July 14, 1937 4 Sheets-Sheet 2 torneys R. w. STEWART GUIDE SETTING MECHANISM Filed July 14, 1937 4 Sheets-Sheet 5 nDentor W Jyfe Wa/ orneys I ay 24, 1938. R W STEWART HJQ- GUIDE SETTING MEGHANISM Filed July 14, 1937 4 Sheets-Sheet 4 Patented May 24, 1938 STATES oi-lce Application July 14,

2 Claims.

My invention relates to improvements in setting mechanism for straight line rip, or, edging saw guides, and the primary object thereof is to provide a mechanism of simple inexpensive construction for accurately and quickly setting the guide of a rip saw machine to rip stock in Widths corresponding to multiples of a selected unit of measurement, for instance, one eighth of an inch.

Another object is to provide mechanism of the Character and for the purpose above set forth,

adapted for attachment to the usual type of rip, or edging machine saws, without necessitating modification of the latter.

Other and subordinate objects are also comprehended by my invention, all of which, together with the exact nature of my improvements, and the advantages thereof, will be readily understood when the following description and claims are read with referenceto the drawings accompanying and forming part of this specification.

In said drawings:

Figure 1 is a View in top plan illustrating my improved setting mechanism applied to a straight line rip, or edging machine saw,

Figure 2 is a view in front elevation,

Figure 3 is a view in end elevation of a combined detent and gauge bar forming part of my invention, together with a supporting bracket therefor,

Figure 4 is a fragmentary View partly in transverse section and partly in side elevation, taken on the line 4 4 of Figure l, looking in the direction indicated by the arrows,

Figure 5 is a detail view in transverse section taken on the line 55 of Figure 4 looking in the direction indicated by the arrows,

Figure 6 is a fragmentary View in perspective of a trigger bar forming part of my improved setting mechanism,

Figure '7 is a view in bottom plan of a detent member, and

Figure 8 is a detail view in vertical transverse section, partly in elevation, taken on the line 8--8 of Figure l, looking in the direction indicated by the arrows.

Referring to the drawings by numerals, the illustrated embodiment of my invention has been shown as applied toA a well known type of rip or edging machine saw including the usual table I across which the stock is fed, in a well known manner, beneath the usual head 2, by means of a travelling bed represented at 3, past the rip saw, or saws, for cutting the stock along a line indicated by a well known form of line indicator 4. In the type of machine with which my inven- 1937, Serin No. 153,667

tion is particularly concerned, the stock is fed past, and against, a stock guide, or fence 5 which is suitably mounted on the front edge of the table I for adjustment along the same laterally of the stock, to gauge the width to be cut from the latter.

According to my invention, means are provided for adjusting the guide 5 as follows:

Pivotally mounted on the table I, as by the pivot bolt 6, to extend forwardly of said table, is a horizontally swingable bar-like hand lever 1 provided at its front end With an upstanding handgrip 8. The hand lever 1 is operatively connected to the guide 5 by means of a link 9 pivoted at one end to the guide 5, as at ID, and having its opposite end similarly secured to the hand lever 1 intermediate the ends of the latter as at I I. The handgrip end of the hand lever 1 extends over and forwardly of a horizontally disposed combined gauge and detent bar I2 of arcuate form and fixed to the table I to extend forwardly thereof for movement of said end of the lever 1 thereover. As will be understood, said bar I2 is curved concentrically of the axis of movement of the hand lever 1. Preferably one end of the bar I2 has extending therefrom an integral bracket arm I3 by means of which said bar is bolted, as at I3', to one end of the table I.

The opposite end of the bar I2 is secured to the underside of the table I by means of a substantially U-shaped bracket I5 depending from said bar and bolted thereto as at I6 and to the table I as at I1. The bracket I5 is of the described shape to clear the front edge of the table I as will be understood. 'Ihe bar I2 is provided with an upper toothed edge I8, the teeth being of ratchet form and spaced, in the present instance, a quarter of an inch apart.

Mounted on the hand lever 1 for vertical rocking movement to engage and disengage the teeth I8 is a detent member I9 of right angled form including a horizontal plate 28 disposed in the engaged position of said member flat on the hand lever 1, and having along one edge thereof a depending bevelled ange 2l forming a dog for engagement with the teeth I8. The mounting for the detent member I9 comprises a right angled bracket 22 underlying the hand lever 1, and comprising a pair of long upstanding arms 23 extending above said lever at one side thereof and a pair of shorter upstanding arms 24 terminating flush with the upper face of said lever. A pair of bolts 25 are extended upwardly through slots 2G in the bracket 22 into the lever 1 and a pair of set screws 21 are similarly disposed in the short arms 24 of the bracket 22 for engagement with the adjacent side of the hand lever, whereby said bracket is adjustable transversely of the hand lever 1. The end of the plate 29 opposite to the flange 2|, is pivotally mounted between the long arms 23 of the brackets 22 by means of a pivot bolt 28. As will be seen by adjusting the bracket 22 the detent member I9 may be similarly adjusted to properly locate the ange 2l in the teeth I8 of the combined detent and gauge bar I2.

Slidably mounted on the hand lever 1, for endwise movement longitudinally thereof, is a trigger bar 29 extending through a pair of guides 30 bolted to said arm 1 upon opposite sides of the detent member I9, respectively, as at 3l and 32, and extending through a groove 33 formed in the underface of the detent member I9. The trigger bar 29 is provided at its front end with an upstanding nger grip 34 located adjacent to the handgrip 8 to be conveniently grasped by the fingers of the hand of an operator grasping said handgrip, whereby the trigger bar 29 may be moved forwardly of the hand lever 1. A tension spring 35 having one end secured to a stud 36 on said trigger bar 29 and its other end secured to a stud 31 on the hand lever 1, urges the trigger bar 29 rearwardly into normal position. The normal position of the trigger bar 29 is established by means of a bolt 38 extending upwardly through the hand lever 1 to be engaged by the rear end of the trigger bar 29. Secured to the underside of the hand lever 1, as by the bolt 38 and a nut 39 threaded onto the stud 31, is a guide arm 40 underlying the combined detent and gauge bar I2 to prevent upward movement of the hand lever 1.

In the normal position of the trigger bar 29, the detent member I9 lies flat against the hand lever 1 with the bevelled flange 2| engaged with the teeth I8 of the combined detent and gauge bar I2, said member being gravity actuated into engaging position.

'Ihe trigger bar 29 is designed, upon forward movement thereof from normal position, to move the detent member I9 to disengaging position and for this purpose is provided with an upper cam face 4I co-acting with a similar face 42 formed in the groove 33vto lift said detent member I9 into a position in which the flange 2| is clear of the teeth I8. Co-acting devices are provided on the hand lever 1 and trigger bar 29 for releasably locking the trigger bar against return from its forward position in which the detent member I9 is disengaged, thereby releasably locking said member I9 against movement into engaging position relative to the teeth I8. In this instance, such means comprises a cam stud 43 extending upwardly from the upper face of the hand lever 1 and seating, with a snap action, in a notch 44 in the underface of the trigger arm 29 adjacent the front end thereof, it being understood that the trigger arm 29 is sufciently resilient to permit the front end thereof to ride up over the cam stud'43. As will be understood, by upward lifting of the front end of the trigger bar 29, through the medium of the iinger grip 34, the notch 44 may be disengaged from the stud 93, or vice versa, whereby the trigger bar, when released, will snap back into normal position releasing the detent member I9 for gravitational ,movement into engaging position relative to a subjacent tooth I8 of said bar I2.

As will now be Seen, by swinging of the handY may be moved toward and from the stock,respec tively, to gauge the thickness of the cut from the stock-and the hand lever 1, together with the guide 5, set in a selected position by coaction of the detent member I9 with the teeth I8 of said bar I2. In this connection, and for obvious reasons, the teeth I8 and ange 2| are designed for coaction to lock the hand lever and guide 5 against movement outwardly of the stock, or, saw line, and to permit said detent member I9 to ratchet over said teeth I8 upon movement of said lever 1 and guide 5 in the opposite direction. The link 9 is connected to the hand lever 1 to 'eiect one-eighth inch increments of movement of the guide 5 for each tooth I8 past which the flange 2I is moved. In other words, the hand lever 1 is moved in quarter inch increments and the guide 5 in eighth increments of movement. The purpose of this is to enable the operator to cut strips in Widths corresponding to multiples of an eighth of an inch for each one-fourth inch of movement of the hand lever 1, this being the unit of measurement most commonly used in cutting strips in certain lines of work, for instance, in veneer work. The face of the combined detent and gauge bar I2 is numbered, as at 46, with numbers up to 2O at every fourth tooth I8 for accurate setting of the hand lever 1 in inch increments of movement. Slidably and removably mounted on said bar I2 is an auxiliary stop 41 settable along said bar and having a tooth 48 for engagement with a selected tooth I8 to retain the same in set position. The stop 41 is for blocking movement of the hand lever 1 past a predetermined setting as will be clear.

The operation of my invention will, it is believed, be clear from the foregoing without further explanation.

While in the foregoing I have described certain preferred relations and constructions of parts, it is to be understood that the present disclosure is illustrative rather than restrictive and that modications both in relation of parts and details of construction may be resorted to without departing from the inventive concept. Hence right is herein reserved to all such modifications falling within the scope of the claims appended hereto.

What I claim is:

1. In a rip saw machine, including a stock supporting table, and a stock guide laterally settable in opposite directions, guide setting means including a hand lever pivoted at one end on the table for horizontal swingingl movement and operatively connected to said guide, said lever having a hand grip end, a toothed arcuate detent bar mounted on said table for swinging movement of said lever thereover, a detent dog comprising an arm overlying said lever transversely and a right angled tooth-engaging end depending therefrom along-side said lever, said arm being pivotally mounted on said lever to engage said end with said toothed bar by gravity, means for elevating said arm and thus disengaging said end from the toothed bar comprising a bar-like trigger member slidably mounted on top of said lever for movement along the same toward and from said hand grip end thereof, respectively, and having a hand grip adjacent the hand grip end of the lever, said trigger member extending underneath the arm of said dog and having an upper cam face coacting with said arm to elevate the latter upon movement of said trigger member in one direction, and means tensioning said trigger member against movement in said one direction.

2. In a rip saw machine, including a stock supporting table, and a stock guidelaterally settable in opposite directions, guide setting means including a hand lever pivoted at one end on the table for horizontal swinging movement and operatively connected to said guide, said lever having a hand grip end, a toothed arcuate detent bar mounted on said table for swinging movement of said lever thereover, a detent dog comprising an arm overlying said lever transversely and a right angled tooth-engaging end depending therefrom alongside said lever, said arm being pivotally mounted on said lever to engage said end with said toothed bar by gravity, means for elevating said arm and thus disengaging said end from the toothed bar comprising a bar-like trigger member slidably mounted on top of said lever for movement along the same toward and from said hand grip end thereof, respectively, and having a hand grip adjacent the hand grip end of the lever, said trigger member extending underneath the arm of said dog and having an upper cam face coacting with said arm to elevate the latter upon movement of said trigger member in one direction, means tensioning said trigger member against movement in said one direction, said trigger member being resilient, and a pair of devices on said lever and member, respectively, coacting with a snap action under reaction of said trigger member to lock the latter against movement under the urge of said tensioning means.

ROBERT W. STEWART. 

